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Hande clashes between same-named exports #14967

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Merged
merged 5 commits into from
Apr 22, 2022
Merged

Hande clashes between same-named exports #14967

merged 5 commits into from
Apr 22, 2022

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odersky
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@odersky odersky commented Apr 18, 2022 •
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Fixes #14966

Two parts

  1. Better error message for "clashes after erasure message". We now print the original types of the clashing definitions as well as their common erased type.
  2. In most cases heal the clash between two export forwarders by picking the one which is better according to overloading resolution.

odersky added 2 commits April 18, 2022 21:45
@odersky
Print double definitions signatures at Typer
857ed96 
Fixes scala#14966
@odersky
Fix check file
3c6425b 
Is this a stability problem? It seems the CI visits Seq definitions in different order than local.
dwijnand
dwijnand reviewed Apr 19, 2022
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@odersky
Avoid export clashes
8d1c435 
Avoid export clashes in most cases by picking the alternative which
would be preferred by overloading resolution. If none is, issue a
more intelligible error message than before.
@odersky odersky changed the title Print double definitions signatures at Typer Hande clashes between same-named exports Apr 20, 2022
odersky added 2 commits April 20, 2022 19:31
@odersky
Print erased type in double definition message
fed2764 
Print erased type if the message says "have the same type after erasure"
@odersky
Pick correct forwarder to avoid clashes
806386e 
We should pick the one which is better, but we mistakenly chose the
worst one instead, since I misinterpreted the ordering.
dwijnand
dwijnand approved these changes Apr 22, 2022
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Very nice

@dwijnand dwijnand merged commit c7c3c14 into scala:main Apr 22, 2022
@dwijnand dwijnand deleted the fix-14966 branch April 22, 2022 10:23
@bjornregnell
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This is awesome!

@griggt griggt mentioned this pull request Jun 22, 2022
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@Kordyjan Kordyjan added this to the 3.2.0 milestone Aug 1, 2023
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Successfully merging this pull request may close these issues.

Strange error when exporting overloaded stuff from the collection library

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@odersky @bjornregnell @dwijnand @Kordyjan